Center portion of a wheel hub



FIG. 1 is a perspective view of a center portion of a wheel hub showing my new design;

FIG. 2 is a front elevational view thereof, it being understood that the rear is a mirror image thereof;

FIG. 3 is a side elevational view thereof; and,

FIG. 4 is a cross-sectional view thereof taken along the line 4--4 of FIG. 2.

The broken line showing of a wheel in FIGS. 1-4 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a center portion of a wheel hub, as shown and described. 